Aug 12 2020
04:00 PM
- last edited on
Feb 01 2023
01:17 PM
by
TechCommunityAP
Aug 12 2020
04:00 PM
- last edited on
Feb 01 2023
01:17 PM
by
TechCommunityAP
I am attempting to do a tenant to tenant migration from 2 Office365 accounts. Microsoft 365 support has not been able to offer any help on this, even though I'm trying to escalate to a manager.
I am using the export/import method to .pst on Windows (running in Bootcamp). For some reason the .pst file is not being fully imported. I can see the 2 accounts show very different disk usage after import. The original is roughly twice the size at around 14gb.
On further investigation, I found that all emails older than 1 year (to the exact day and time of the export) are blank. They contain headers, but not content or attachments.
There is a setting to choose how much email to download, and it's set to all for both accounts.
3rd party migration tools are apparently for bulk migrations (I only need to do 2 mailboxes). Mover.io apparently used to do this, but was bought by Microsoft and no longer works (I queried their support).
Powershell-based methods seem to be very poorly documented.
Over on superuser forum, I was suggested to:
Disable "Cached Mode" prior to exporting your PST, this will cause Outlook to pull data directly from the Exchange server which will take a little bit longer but will give you a complete mailbox export.
I have done this. However:
Aug 13 2020 03:07 PM
After importing into the target account/mailbox previously the size ended up being about half of that.
https://superuser.com/questions/1577252/tenant-to-tenant-migration-using-outlook-only-imports-conten...